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Vantage to Pomona Heights Chapter 3 <br />230 kV Transmission Line Project FEIS Affected Environment <br /> PAGE 3-320 <br />SERIES DESCRIPTION <br />Timmerman <br />Found on outwash plains, terraces. The parent material consists of glacial outwash and alluvium. In some <br />portions of this component, depth to a root restrictive layer, strongly contrasting textural stratification, is 10 to 20 <br />inches. In other places, depth to a root restrictive layer is greater than 60 inches. The natural drainage class is <br />well drained <br />Torrifluvents Found on floodplains. The parent material consists of alluvium. Depth to a root restrictive layer is >78 inches. <br />The natural drainage class is somewhat excessively drained. <br />Vantage Found on ridges, hillslopes. The parent material consists of loess, colluvium and residuum from basalt. Depth to <br />a root restrictive layer, bedrock, lithic, is 12 to 20 inches. The natural drainage class is well drained. <br />Wanapum Found on alluvial fans. The parent material consists of loess and alluvium. Depth to a root restrictive layer, <br />duripan, is 11 to 19 inches. The natural drainage class is well drained. <br />Wanser Found on floodplains or depressional areas. The parent material consists of sand derived from mixed sources. <br />Depth to a root restrictive layer is >78 inches. The natural drainage class is poorly drained. <br />Whiskeydick <br />Found on sideslopes, plateaus, and benches. The parent materials consist of residuum and colluvium from <br />basalt ant minor amounts of loess. Depth to a root restrictive layer, bedrock, lithic, is 20 to 40 inches. The <br />natural drainage class is well drained. <br />Wiehl <br />Found on terraces. The parent material consists of eolian deposits over residuum weathered from sandstone <br />and siltstone. Depth to a root restrictive layer, bedrock, paralithic, is 20 to 40 inches. The natural drainage class <br />is well drained <br />Willis Found on uplands. The parent material consists of loess. Depth to a root restrictive layer, bedrock, lithic, is 30 to <br />60 inches. The natural drainage class is well drained. <br />Winchester <br />Found on terraces, dunes, and terrace escarpments. The parent material consists of sandy alluvial and eolian <br />sand or glacial outwash. Depth to a root restrictive layer is >78 inches. The natural drainage class is excessively <br />drained. <br />Windry Found on hillslopes and ridgetops. The parent materials consist of stony colluvium from basalt and loess. Depth <br />to a root restrictive layer, bedrock, lithic, is 14 to 20 inches. The natural drainage class is well drained. <br />Wipple <br />Found on hillslopes, footslopes, and structural benches. The parent materials consist of basalt colluviums with <br />additions of loess. Depth to a root restrictive layer is 40 to more than 60 inches. The natural drainage class is <br />well drained. <br />Wockum Found on hillslopes. The parent materials consist of loess mixed with volcanic ash in the surface and colluviums <br />from basalt. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is well drained. <br />Zen <br />Found on hill slopes, ridges and benches of dissected basalt plateaus. The parent material consists of loess <br />and slope alluvium above basalt bedrock. Depth to a root restrictive layer, bedrock, lithic, is 20 to 40 inches. The <br />natural drainage class is well drained.